<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/9/21
 * Time: 11:39
 */
if (file_exists("aa.txta")){
    $a = unlink("aa.txta");
    var_dump($a);
}

$a = @unlink("用户.txt");
var_dump($a);